Demountable tire-rim.



B. G. BALL.

i DEMOUNTABLE TIRE RIM. APPLICATION FILED JULY?, 1910. @Qgo FatentedJuly 25, WE L Z' SHEETS-SHBET l.

I SH01/mm3 B: G. BALL. DEMOUNTABLE TIRE RIM. APPLICATION FILED JULY 7,1910. @@Q @muted July 25, wu;

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BERT C. BALL, OF PORTLAND, OREGON.

i DniroUN'rAzeLn TIRE-nm.'

To all whom it content:

Be it known that I, BERT C.I.BALL, a citi-- zen of the United States,residing at Portgeous where it is desired to carry a tire on,

land, in the county of Multnomah and State of Oregon, have invented new'and useful Improvements in Demountable Tire-Rims, o fwhich the followingis a specification.

This invention relates to demountable tire rims, and consists in certainimprovements in the construction thereof as will be hereinafter fullydescribed and pointed out in the claims.

The invention is particularly advantathe rim in an inflated condition.In addition to this, thepresent constructon is such that the tire itselfmay be quickly and readily detached from the rim, so that, in

this sense, .the invention relates to a separable rim.

The invention is illustrated in the accompanying drawings as follows: y

Fi re 1 shows a section on the line 1-1 in Fig 2. Fig. 2 shows aside'elevation of the wheel with the tire in place thereon. Fig. 3, asection on the line 3-, 3 in Fig. 4, showing the rim parts separated.Fig. 4, a view of a fragment of the rim parts, the view bein from theinterior of the rim. Fig.5, a side elevation of the rim, showing themethod of separating the rim parts to detach the tire. Fig. 6,a't-ransverse section through the Wheel felly and rim, showing themanner of placing the tire rim-on the felly. Fig. 7 is a section on theline 7-7 in Fig. 2.

1 marks the wheel and 2 the wheel fellyl usual manner. It has thetapered surfaces tia-3a. The tire rim 4 may be of any form, butas shownis of the clencher type. It is separated eircumferentially,s and has theshoulders 5 arranged on its inner eriphery. A locking ring 6 is, whenthe rim 1s in place, arranged on the inner periphery of the rim parts 4.lt has an annular groove, the walls of which form 'the shoulders 7adapted to engage the shoulders 5 on the rim parts. These shoulders 5and 7 are preferably undercut, so that when the locking ring is in placein the-rim, and the tire inflated, the pressure of the tire on theshoulders holds the rims securely in place. The ,locking ring isseparated transversely, and it is preferably of slightly less lengththan Sullicient to lill the entire inner periphery of Sbecicaton ofLetters Patent. Application led July 7, 1910. Serial No. 570,861.

Patented July 25, 19M.

the rim parts. The distance betweenthe tends 1s preferably such thatwhen the two i ends of the locking ring are brought toi gether the .ringis so far collapsed as to permit of its ready removal from the rimparts. A filling piece 8 of the same cross section as the locking ringis snapped into place between the ends of the locking ring when thelocking ring is in place. The ends 9 of the @locking ring varepreferably slightly. This may be vaccomplished by making the endsexactly radial, and the ends 10 of the filling piece 8 are cut toconform to the ends of the ring. The illing piece is of such length thatby pressure it can be forced between the ends of the ring, and, whenonce snapped in place, is held in place by the undercut portions, evenbefore the tire is inflated. This use of the filler facilitates verygreatly the removal and the reassembling of the parts. The locking ringhas the beveled surface 6a 0n its inner periphery, conforming to thebeveled surface 3a on the fixed rim. These tapered surpermit of thelocking ring being moved axially from the side of the fixed rim to placeon the wheel rim. The bolts'll extend through perforations la in thefelly. They are provided with the heads 1:2 which engage the lockingring, and they are .screwedA into the socket nuts 13 secured in thefelly. By simply settingr up these bolts the locking ring is forced ontothe wheel rim, and thus wedged out against the tire rim, locking andcentering the whole securely.

One of the rim parts is provided with a lip 14, the outer surface 15 ofwhich is of less diameter than the tire base 4 on the rim.v The oppositetire rim part has a lip 16, the inner surface 17 havingr u diameterequal to the diameter of the surface 15. These lips have the taperededges 1S and 19, so that one rim part may be readily forced onto theother. T hese tapered edges of the lips on the rim parts facilitate thedetaching of the tire, and the reasembling of the rim very greatlybecause with the tire in place the lip 111 will not otherwise readilyenter. lVith the tapered surface,`howe\f'er. the parts are readilybrought into engagement und the inner lip made to enter the outer lipperfectly. These overlapping lips not only center one part of the rimwith relation to the other, but they protectV the tire from any injurywhich might be incident to any open- -faces extend in the samedirection, that is,v

undercut loo ing directly throughl the rini parts. vThey are soproportionedas to ermit of the rim parts being moved toget ertelescopically sufficiently to allow the placing of the lock ing ringenthe shoulders 5-5 and then allow the outward movement of the riin partsnecessary to bring into engagement the undercut shoulders withoutforming an opening at the center of the rim.

I prefer to provide a dowel 20. This is secured in the lip 1G, A notch2l is ar ranged in the lip 14 which permits of the slipping ofthe lip 14into the lip 1G. The

stem. The part vof the locking ring remain-l ing may very readily be runaround into place. U

It is essential tothe quick operation ,of

this device thatr the shoulders 5 and 7 have such continuity that thelocking ring may be slipped alongtlie shoulder in its collapsingmovement and also so that in assembling the parts having positioned. oneend of the ring the other rparts'niay be broughtI together by the actionof the ring itself against the edges of the shoulder. Where thiscontinuity is lacking it is difficult to hold the parts in place whilerunning the locking ring onto the rim parts.

lt will be noted that. the undercut shoulders securely bind the partstogether under the influence of the pressure in the tire. This isparticularly desirable while the tire and rim are demounted. On theother hand,

thc wedging action of the surfaces on the wheel rim and interior of thelocking ring securely lock the parts together,l regardless of whetherthere is pressure in the tire when the tire and rim are mounted. This isparticularly desirable because it prevents the separation of the partsin case of puncture or accidental deflation of the tire.

By carrying the riin parts inwardly to the center and preferably pastthe center by reason of the overlap a large surface is sul) jected totire pressure in a radial direction relatively to the wheel. This widthof rini 'and the flanges formed hy the overlap inside the shoulders alsostillens the riin parts so that light material may be used withoutdanger of the tire shoulders on the rim turning or springing so as torelease the tire.

It will be noted that.. with the annular undercut shoulder on thelocking ring and flanges or surfaces extendingr outwardly from saidshoulder forming bases on which the rim parts rest, the rim parts,heilig hooked, 'as itwere', intheiindercut grooves,

are braced by the outwardly extending fian'ges on the locking ring sothat the collapsing of the rim parts can only be eected by the crimpingin of these outwardly ex- '/0 tending flanges. Furthermore, when thelocking ring is used as part of the demounting scheme, these flangesgive the metal for the tapered surfaces. The flanges formed by theoverlap and the `anges formed outside shoulders on the loc-king ring canbe 4given a more uniform and effective width as to both rim parts andlocking ring when the shoulders are some distance from the -lcenter ofthe rim and at each side of the eenter of the riin. This bracing of onepart lupon the other and arranging and`shaping t-he parts with relationto the direction of strain is of great importance, in that it permits ofgreatly reducing the weight and at gthe saine time giving great strengthin the direction of strain.

The locking ring is preferably turned or Imachined to the exact diameterof the fixed rim so that the shoulders come int-o engage 90 mentaccurately throughout the length of the rim,

What I claim as .new is:

l. In a demountable tire rim, the combi- ,nat-ion of a two part rimsepa-rated circumferentially, each part having an annular undercutshoulder on its inner periphery; a locking ring separated transversely,and having annular. undercut shoulders to receive the undercut shouldersof the rim; and

lmeans for securing the locking ring on the lwheel.

2. In a demountable' tire rim, the combination of a two part rimseparated circum* ferentially, each part having an annular undercutshoulder on its inner periphery; a v locking ring separatedtransversely, and having annular undercut shoulders to receivetheiiiidercut shoulders of the rim, said locking ling being oflesslength than the `full circumference of the inner periphery of therim parts a filling piece adapted to i be put in place after the ring isin place completing the, ocking ring; and means for securing the lockingring on the wheel.

3. In a demountable tire rim,- the combination oi a two part rimseparated circumfei'enti-n ily, each part having an annular undercutshoulder on its inner periphery; a locking ring separated transversely,and having annular undercut shoulders to re-` ceive the undercutshoulders of the rim, said locking ring being `of less length than thefull circumference of the innerperiphery of the rim parts; a fillingpiece adapted to be put in place after the ring is in place completingthe locking ring, the ends of the locking ring being undercut, and theends of l the filling piece formed to engage the undercut ends of thelocking ring.

Y 4;. In a deinountable tire rim, the combination of a. two part tirerim separated cir- `the 4hase of the rim parts when moved to normalposition; a locking ring separated transversely, and having an annularundercut shoulder to receive the undercut shoulder of the rim parts; andIneans for securing the ring on the Wheel. Y In a demountable tire rim,the combination of a tivo part tire rim separated cireumfere'ntially,each part having an annular Iundercut shoulder on its inner peripheryand'each having an annular 'lip for telescoping the other; a lockingring having undercut shoulders engaging the shoulders of the a doWel pinsecured to one lipl and into the. locking ring; and means for securingthev rim parts; extending through the other,

locking ring to the Wheel.

6. In a demountalole tire rim, the'comloination of a two part rimseparated circum-v ,eachv part having an annular;

and telescoping lips; a locking ring separated tranS- erentially,shoulder on its Ainner periphery,

versely, and having annular undercut shoulders to receive of said lipsextending through the other of said lips, and through said locking ringad jacent to one of the ends thereof.

7. In a demountalole'tire rim, the combination of a tire rim separatedclrcumfer vdercut shoulder on its' inner periphery;

.dercutshoulder o-n its inner periphery; s a locking ring separatedtransversely and the undercut shoulders onVv the rim parts and a dowelpin secured to one Witnesses.

entially, each part having an annular una locking ring separatedtransversely and having annular undercut shoulders thereon to receivethe shoulders on the rim parts, the shoulders being at each side of thecenter 8. In a demountable tire rim, the combination o a tire rimseparated circumferentlally, each part having an annular unand having,annular undercut shoulders thereon to receive the shoulders on the rimparts, the shoulders on the ring having flanges eX- tending' laterallyfrom the shoulders forming supporting bases for the rim parts.

9. In a demountable tire rim, the combination of .a tire rim separatedcircumferentially, each part having an annular un-l dercut shoulder' onits inner periphery,

each part having an inwardly extending lip,

said lips overlapping; and a locking ring separated transversely andhaving annular undercut shoulders to receive the shoulders onf-the rimparts, said ring being provided with flanges extending ,laterally fromthe shoulderson the ring forming bases and supports for the rim parts.

In testimony whereof I have hereunto set my hand in the presence of tWosubscribing BERT C. BALL.

Witnesses: Y

H. C. LORD, A. M. PARKINS.

and.

